Question 427621
The original fraction is {{{x/(x+2)}}}
Then the new fractions is {{{(x+1)/(x+3) = 4/5-> 5(x+1) = 4(x+3)}}}
Solve for x: 5x + 5 = 4x + 12 -> x = 7
So, the original fraction is 7/(7+2) = 7/9